aop编程 环绕round
1 <?xml version="1.0" encoding="UTF-8"?> 2 <beans xmlns="http://www.springframework.org/schema/beans" 3 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 4 xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd" default-autowire="byName"> 5 6 <!-- 配置代理关系 --> 7 <!-- 目标类 被代理人对象 --> 8 <bean id="target" class="dao.imp.UserDaoImp"></bean> 9 <!-- 切面 方面代码(通知代码)--> 10 <bean id="roundAdvice" class="aop.RoundAdvice"></bean> 11 12 <!-- 代理类 代理人对象--> 13 <bean id="proxy" class="org.springframework.aop.framework.ProxyFactoryBean"> 14 15 16 <!-- 代理用到的接口 拦截者:指明方法代码的封装对象--> 17 <property name="proxyInterfaces"> 18 <list> 19 <value>dao.UserDao</value> 20 </list> 21 </property> 22 23 <!-- 目标对象 指明被代理人--> 24 <property name="target" ref="target"> 25 </property> 26 27 28 <!-- 切面 拦截者 :指明方面代码的封装对象 --> 29 <property name="interceptorNames"> 30 <list> 31 <!-- <value>beforeAdvice</value> --> 32 <value>pointcutAndAdvice</value> 33 </list> 34 </property> 35 </bean> 36 <!-- 配置带切入点的bean 37 进一步封装代码 ,提供过滤被代理方法的功能 。效果 :被代理接口中方法集合的子集被代理执行--> 38 <bean id="pointcutAndAdvice" class="org.springframework.aop.support.RegexpMethodPointcutAdvisor"> 39 <property name="advice" ref="roundAdvice"></property> 40 <property name="patterns"> 41 <list> 42 <value>dao.UserDao.saveUser</value> 43 <value>dao.UserDao.deleteUser</value> 44 </list> 45 </property> 46 </bean> 47 </beans>
applicationContext-round.xml
package aop; import org.aopalliance.intercept.MethodInterceptor; import org.aopalliance.intercept.MethodInvocation; public class RoundAdvice implements MethodInterceptor{ @Override public Object invoke(MethodInvocation method) throws Throwable { // TODO Auto-generated method stub System.out.println("开始"); Object obj=method.proceed(); System.out.println("结束"); return null; } }
RoundAdvice.java
1 import org.springframework.context.ApplicationContext; 2 import org.springframework.context.support.ClassPathXmlApplicationContext; 3 4 import dao.UserDao; 5 6 7 public class TestAop { 8 9 public static void main(String[] args) { 10 // TODO Auto-generated method stub 11 ApplicationContext ctx=new ClassPathXmlApplicationContext("/applicationContext-aop.xml"); 12 //获取文件 13 UserDao dao=(UserDao) ctx.getBean("proxy"); 14 //得到代理 15 dao.saveUser(); 16 dao.deleteUser(); 17 dao.findUser(); 18 } 19 20 }
test.java